4/19/2011 @ 6:00PM

Gallery: Updates On America's Most Promising Companies Class Of 2009

Gallery: Updates On America’s Most Promising Companies Class Of 2009

In 2009 Forbes went on an exhaustive hunt for dynamic, privately held businesses with truly scintillating growth prospects. The best constituted our collection of America’s Most Promising Companies. Here is how they have fared thus far. (To sharpen our search this year, Forbes teamed up with CB Insights, which tracks investment in privately held companies. With financial support from the National Science Foundation, CB Insights has created software that mines millions of online documents and applies statistical models to form a more detailed, nuanced and real-time assessment of company’s prospects.) Click here to nominate your company, or someone else’s that you know well, for this year’s AMPC list.